I don't know... if you order the Dell they send you all that crap like Microsoft Word and whatnot with extra CD's which is good, because then you don't have to buy it. You also get Windows XP with an install disk with it. In the future it would DEFINITELY be wise to build one though, and just install that version of Windows XP on it instead of ordering another Dell.
Windows xp home edition=90 bucks. Also, you can't upgrade dells that well. They specifically make their manuals very general, so you dont get much info from them. ALso, i heard that they modify their ram slots, and power supply.